Sucker-rod elevator



Dec. 7; 1926.

N. R. COLLISON SUCKER ROD ELEVATOR Filed Dec. 29, 1924 NORMAN R. COLLISOLI Patented Dec. 7, 1926.

Ui'itli), STTES PATENT NORMAN It. COLLISOH, 0F Q1311) NEBRASKA.

STICKER-ROD ELEVATOR.

Application filed December 29, 1924:. Serial No. 758,595.

My invention relates to sucker-rod elevators; and the object is to provide a simple tool which makes the lowering and raising of sucker rods absolutely safe, and which is simple in construction and operation. Other objects and advantages will be fully eX- plained in the following description and the invention will be more particularly pointed out in the claims.

Reference is had to the accompanying drawings which form a part of this application.

Fig. 1 is a plan view of the gripping elevator with the handle turned down to horizontal position. Fig. 2 is a side elevation of the same as it appears in operation.

Similar characters of reference are used to indicate the same parts throughout the several views.

The elevator 1 has an opening or throat 2 to receive the sucker rod. The elevator 1 is provided with a two pronged handle 3 and the prongs 3 and 1 are pivotally connected to the elevator 1 by studs 4 and 5 which may be cast integral with the elevator 1. The handle 3 has bearings 6 which engage the studs 4 and 5 and has a loop or hook engaging member 7 which is connected to the handle 3 by a swivel connection. The handle has an enlarged portion 8 and the loop 7 has a cylindrical base member 9 which has a cavity in the upperside for the head 10 of the screw bolt 11. The loop 7 with its base will turn freely on the upper end of the part 8 and is held in operative relation thereto by the head 10 of the bolt 11. The object of the swivel connection is to prevent the cable from unscrewing the sucker rod below the surface. The tendency of the cable to turn will be compensated by the swivel connection which will permit the cable to turn without effecting any force on the sucker rod below the elevator.

The elevator 1 receives the sucker rod in the throat 2 and is held therein by a locking plunger or bolt 12 which has an enlarged head 18. The head 13 has a cavity 14 to receive the end of an operative lever 15 which is fulcrumed on the arm 3 of the handle 3 and the upper portion of the lever 15 is curved in cross-section to engage the handle 3 and the extreme end is bifurcated and the ends 16 are curved to project past the handle 3 so that objects will not fall in between the lever and the handle during operation. A spring 17 is attached to the lever 15 and the free end bears against the handle for the purpose of holding the lock 12 thrust into the throat 2 for preventing the elevator fromleaving the sucker rod.

When the sucker rod is to be released or the elevator released from the sucker rod, press the lever 15 to the dotted outline position shown in Fig. 1. This action will draw the lock 12 to the dotted outline position shown I in Fig. 1. The arm or prong 4 of the handle has a stop 18 to prevent the handle from dropping below horizontal position as shown in Fig. 1 and also to prevent the handle from falling to the right of the vertical position as shown in Fig. 2.

The object is to keep the handle in easy reach of the operator by holding the handle in horizontal position and to provide the stop 18 in position to rest on top of the tool or connection to be operated.

The device is shown in operative position in Fig. 2. When the sucker rod has been elevated by this device to bring a section of the sucker rod above the surface, a second elevator is used to engage the next section below which can be shoved in horizontally, as shown in Fig. 1. It will be understood that two elevators are to be used. The cable is provided with a hook which engages the loop 7 of the handle. The cable is then drawn upwardly by running on a sheave or some other means of drawing the cable upwardly and this will draw the elevator which is in engagement with the sucker rod.

t is apparent that the elevator above shown may be used for other purposes than elevating and lowering sucker rods. For instance, the device is readily adaptable for elevating other rods and also pipes. It is apparent that various changes in the sizes, proportions, construction and arrangement of the several parts may be made without departing from my invention.

lVhat I claim is 1. An elevator for sucker rods and the like comprising a rectangular block provided with bearing studs projecting lateral- 1y therefrom and having a receiving throat for the sucker rod and having a cavity for a locking device, a lifting handle provided with two arms pivotally connected to said bearing studs, a plunger lock mounted in said cavity and provided with a grooved head projecting laterally from said block, a spring-controlled lever fulcrumed on one arm of vsaid-handle and -curvedand bifurcated to project on each side ofsaidhandle and having its operating end projecting into the groove of said head for actuating said lock and holding the said lock projected partly across said throat to prevent the sucker rod from leaving said block, and a stop formed on the other arm of said handle-and engaging said block for holding said handle in operative position.

forasucker rod and having a cavityndjacent to said throat .foradocking-device, a lifting handle provided "with .tWo armsipivotally connected to said bearing; studs, a plunger lock mounted in said cavity and rovided with a 'rooved head 'aro'eotin a: l c

laterally from said block, a spring-controlled lever fulcruined' on'said handle and curved to fol-ma vertical groove to receive said handle and having its operating end projected into said grooved headfor actuating said lock and normally holding the lock projected partly across said throat, and having-its powerend bifurcated and projecting pastsaid handle to pr *ent accidental displacement ofsai-d lever;

1-11 testimony-iwhereof,I set my l1and:,;this 23rd day 04:" Decembeiy 1924.;

NORMAN R; COLLISON. 

